Calculating average speed

Answers

Answer 1

Answer:
Average speed =

(distance covered during some period of time)
divided by
(length of time to cover that distance).

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If you push down on a table with a force of 5 newtons, what is the normal force pushing back on you?

You notice that heat is released during a chemical reaction. This reaction is a(n) _______ reaction. endothermic heat hot exothermic

Answers

The reaction is an exothermic reaction.

A quarter is 2.4 millimeters thick. How tall are the following stacks of quarters?a. A stack worth 50 cents
b. A stack worth $1
c. A stack worth $5
d. A stack worth $1,000
(Give your answer in millimeters and meters.)

Answers

A. 4.8 millimeters
B. 9.6 millimeters
C. 48 millimeters
D. 9,600 millimeters or 9.6 meters
There are 1000 mm in a meter

A motorbike is traveling to the left with a speed of 27.0 m s 27.0 s m 27, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction when the rider slams on the brakes. The bike skids 41.5 m 41.5m41, point, 5, start text, m, end text with constant acceleration before it comes to a stop. What was the acceleration of the motorbike as it came to a stop?

Answers

Answer:

Explanation:

Initial velocity , u = 27 m/s

displacement before stop, s = 41.5 m .

final velocity, v = 0

acceleration a = ?

v² = u² + 2 a s

0 = 27² + 2 x a x 41.5

a = - 27² / 2 x 41.5

= - 8.78 m /s

Which one of the following accurately describes the force of gravity

Answers

The force of gravity, also called gravitational force, is the force exerted by the gravity of one object to another object near it. This is dependent on factors like mass of the two objects measured between their centers.

Two technicians are discussing hydraulics. Technician A says that if pistons of the same size are used, motion and force can be increased or decreased. Technician B says that if a small piston acts upon a larger piston, the force of the larger piston will increase, but the distance it travels will decrease. Who is correct? A. Technician B only B. Technician A only C. Both Technician A and B D. Neither Technician A nor B

Answers

the correct option is A. Only technician B is correct.

Hydraulics works on the pascal law, which states that in a direction the hydro static fluid pressure remains constant.

Px=Py=Pz

Since small piston has small area compare to the large piston

Pbig=Psmall

Fbig/Abig=Fsm/Asm

Fbig= $(Abig)/(Asmall)*Fsmall$

thus the force on the large piston will increase, but it travel small distance.

brad rides his bike 20 km . he covers the distance in 45 minutes (0.75 hours) what is his speed in kilometers per hours ? a. 44 km/hr b. 15 km/hr c. 9.0 km/hr d. 27 km/hr

Answers

D. 27 km/hr :) Just msg if you need any more help :)

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